The Continuum of Addiction Care

Key takeaway

ASAM's Fourth Edition describes four broad levels, from outpatient care to medically managed inpatient care, with decimal steps inside them. SAMHSA's plain-language list is outpatient, intensive day treatment, hospital inpatient, and residential. A recovery home can sit beside outpatient care. It is not a hospital. Hours and names still vary by plan.

Last updated: Mon Oct 05 2026 00:00:00 GMT+0000 (Coordinated Universal Time)

You are looking at a 28-day sign and trying to tell whether that building is the care you need or only one stop on a longer path. Treatment is a range of intensity, not a single building. ASAM's Fourth Edition still describes that range as four broad levels. Level 1 is outpatient treatment. Level 2 is intensive outpatient or high-intensity outpatient treatment. Level 3 is residential treatment. Level 4 is medically managed inpatient treatment. Decimal numbers inside those levels mark how many clinical hours you get and who leads the plan. SAMHSA explains the same landscape without the decimals: a same-day visit, a longer day program, an overnight hospital stay, or a residential program where you live on site. You may need more than one of them, in sequence or because the first one was not enough.

The hour comparison, including older criteria that many plans still quote, is the IOP and partial-hospitalization guide. Why withdrawal management is not the whole course is the detox guide. The risky handoff after a residential stay is the step-down guide. If withdrawal has already caused a seizure, severe confusion, or trouble breathing, call 911. Day treatment and a recovery house are not detox. For a mental health crisis, call or text 988.

What the decimals mean

ASAM's adult overview says Levels x.1 and x.5 are clinically managed, which means clinical staff lead the treatment plan. The x.1 programs, Levels 2.1 and 3.1, are the less intensive of those. They provide 9 to 19 hours of clinical services a week, mostly counseling and psychoeducation, though not only that. The x.5 programs put more weight on psychotherapy. Level 1.5 is under 9 hours a week. Levels 2.5 and 3.5 are at least 20 hours a week.

Level x.7 programs are medically managed. Medical staff lead the plan. The focus is heavier on withdrawal and other biomedical care, and the overview says these programs still provide psychosocial care for the substance use disorder itself. Level 4 is the hospital end of that idea: medically managed inpatient treatment. ASAM's FAQ draws a bright line you can use in conversation. Inpatient means a hospital under a hospital's regulatory rules. Residential is less intensive than that. A person might receive a 3.7 level inside a hospital, but ASAM says most 3.7 programs are residential.

The Fourth Edition also adds Level 1.0, long-term remission monitoring: checkups for people in sustained remission, and a way back into care if it is needed. That is a chronic-care idea. It is not a weekly therapy hour, and it is not an alumni newsletter.

None of these numbers is a law. ASAM's about page says the point of the criteria is a full assessment and the least intensive level that is still safe and effective. It also says length should follow the person's progress. A benefit built around a fixed stay, such as a 28-day program, is the pattern ASAM argues against. That assessment is the program-comparison guide. Ask the program and the payer which edition they are using before you treat a decimal on a brochure as your authorization.

SAMHSA's settings, and how common each door is

SAMHSA's public treatment-types page, updated April 24, 2023, is the version written for patients. Standard outpatient care looks like a doctor's visit for people who can keep appointments. Intensive outpatient care or partial hospitalization adds one-to-one time, groups, and coping-skills work, usually for at least a few hours, with tighter coordination. Many opioid treatment programs are outpatient. Telehealth can be used for first-line care and for maintenance. Inpatient care is an overnight stay, typically when someone needs 24-hour attention, and most of those programs are tied to a hospital or clinic. Residential care means living at the program, usually for a few weeks to a few months, sometimes longer when the condition is more serious. Interim care is what SAMHSA describes when you need help now and the right slot has a wait: daily medicine and emergency counseling until the opening exists.

The 2024 National Substance Use and Mental Health Services Survey counted what facilities offered, not what any one person should receive. Among substance use treatment facilities, 83.8 percent offered outpatient care, 22.5 percent offered residential care, and 7.5 percent offered hospital inpatient care. Those shares overlap, because one facility can offer more than one setting. Outpatient is the common door. It is not automatically the right door. Someone who needs 24-hour medical monitoring for alcohol or benzodiazepine withdrawal is a poor fit for a weekly visit. The detox guide is that distinction. Someone who is stable and working may be a poor fit for a month in a bed. The assessment decides.

Where a house fits, and when the level should change

A recovery residence is easy to mistake for Level 3 because people sleep there. ASAM's Fourth Edition page says the criteria may recommend a recovery residence in addition to outpatient care at Levels 1 and 2. Addition is the word. The clinical hours still have to come from a program. The house as a support setting is the sober-living guide. Written expectations, including why a house should not ban prescribed medication, are the house-rules guide. Do not use a shared house as a withdrawal ward.

Movement along the continuum is supposed to follow reassessment. If symptoms worsen, a higher level can be the safe one. If they ease, a lower level can be the safe one. The step-down guide is the specific risk when people leave residential care without a clear next clinician. What a return to use should do to the plan, including a step up, is the during-treatment guide. The direction comes from the reassessment, not from a brochure.

FindTreatment.gov lets you filter programs by the kind of care they offer. A filter is not an assessment. Call or text (800) 653-9376 to ask how these levels differ for the situation you are describing. The payer, not a referral conversation, authorizes a benefit.

Additional Resources

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Common Questions

What are the four broad levels in the Fourth Edition?

ASAM's adult overview names Level 1 as outpatient treatment, Level 2 as intensive outpatient or high-intensity outpatient treatment, Level 3 as residential treatment, and Level 4 as medically managed inpatient treatment. Decimal numbers mark smaller steps inside those four. The overview says Levels 2.1 and 3.1 provide 9 to 19 hours of clinical services a week, Levels 2.5 and 3.5 provide at least 20 hours, and Level 1.5 provides less than 9 hours with more focus on psychotherapy. A payer may still be using an older edition. Ask which one.

Is a recovery house one of the levels?

Not as a substitute for them. ASAM's Fourth Edition page says the admission criteria may recommend a recovery residence in addition to an outpatient level, meaning Levels 1 and 2. The bed is support beside treatment. It is not hospital care, and it is not a reason to skip withdrawal management. The sober-living guide is the house. The house-rules guide is what should be in writing before you move in.

How does SAMHSA describe the same idea without the numbers?

SAMHSA's treatment-types page, updated in April 2023, uses plain settings. Outpatient means you leave the same day. One kind looks like a standard visit. The other is intensive outpatient or partial hospitalization, usually at least a few hours, with more coordination. Inpatient means an overnight hospital or program stay, usually for people who need 24-hour care. Residential means you live at the program, usually for weeks or months. You may need more than one type. The names on a brochure are not the assessment.

Do most facilities offer every level?

No. In SAMHSA's 2024 facility survey, 83.8 percent of substance use treatment facilities offered outpatient care, 22.5 percent offered residential care, and 7.5 percent offered hospital inpatient care. A facility can offer more than one, so those shares are not slices of a single pie. The survey counts what facilities reported that year. It does not say which level you need.

Where are the hour-by-hour and discharge comparisons?

The IOP and partial-hospitalization guide compares the day-treatment bands, including the older 9-hour description. The detox guide separates withdrawal management from ongoing treatment. The step-down guide is the handoff after residential care, which SAMHSA flags as a high-dropout point. The notes here are the map. They do not repeat those three arguments, and they do not assign you a level.